description HD 202206 b Overview
HD 202206 b is a very massive companion of the solar-type star HD 202206. Its measured minimum mass is about seventeen times the mass of Jupiter, placing it near the boundary between the most massive planets and brown dwarfs. The object was discovered through radial-velocity observations, which detect the motion induced in the host star. Because its true mass depends on the unknown orbital inclination, its classification has been discussed in the context of the planet-brown-dwarf transition.
help HD 202206 b FAQ
What is HD 202206 b?
HD 202206 b is a very massive companion orbiting the solar-type star HD 202206. Its measured minimum mass is about 17 times the mass of Jupiter.
Is HD 202206 b a planet or a brown dwarf?
Its mass places it near the boundary between the most massive planets and brown dwarfs. The label depends on how the object formed and on the classification convention being used.
How was HD 202206 b discovered?
HD 202206 b was discovered through radial-velocity observations. Astronomers measured the motion of HD 202206 caused by the companion's strong gravitational influence.
Why is the mass of HD 202206 b called a minimum mass?
Radial-velocity measurements provide a minimum mass because the system's orbital tilt is not always known. The true mass could be higher if the orbit is viewed at a lower angle.
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